Operational Data Checking

An automatic data checking system has been implemented at ECMWF to trigger warnings in case of anomalies affecting the quality or the availability of the data assimilated by the model. Selected statistical parameters (number of observations, bias correction, and mean bias-corrected background, analysis departures and probability of gross error) are checked against an expected range. An appropriate alert message (including a time series plot) is generated if statistics are outside the specified ranges. A severity level (slight, considerable, severe) is assigned to each message depending on how far statistics are from the expected values. Two kinds of ranges are used by the automatic checking: Soft and Hard limits. Soft limits are updated automatically using statistics from the last twenty days (extremes are excluded during this process). Hard limits are adjusted manually when required.

Currently, the automatic checking is limited to data passing through the minimisation process (including VarBC passive data). It's being applied twice a day to the delayed cut-off 4D-VAR cycles (00 and 12) and four times a day to the early delivery assimilation system (00,06,12 and 18).

The alarm system results are based on feedback information from the ECMWF data assimilation and consequently reflect the ECMWF data usage. Although most warnings are related to data problems, they may on occasion also be related to model issues. Alerts are provided for information on an as-is basis and may be withdrawn or changed without notice. ECMWF accepts no responsibility for actions taken on the basis of these results.

Early delivery 4D-VAR at 2022-08-17 06:00

amsua
NOAA-15 AMSUA ALL SKY RADIANCES CHANNEL 7 : out of range
Considerable: stdev_norm_fgdepar=0.8902, expected range: 0.6969 0.8088
iasi
METOP-B IASI RADIANCES CHANNEL 258 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0857, expected range: -0.1015 -0.0966
METOP-B IASI RADIANCES CHANNEL 260 : out of range
11 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0334, expected range: -0.0512 -0.0418
METOP-B IASI RADIANCES CHANNEL 269 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1591, expected range: -0.1887 -0.1786
METOP-B IASI RADIANCES CHANNEL 272 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1717, expected range: -0.1964 -0.1962
METOP-B IASI RADIANCES CHANNEL 273 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1457, expected range: -0.1692 -0.1642
METOP-B IASI RADIANCES CHANNEL 292 : out of range
12 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0986, expected range: -0.1154 -0.1084
METOP-B IASI RADIANCES CHANNEL 323 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2008, expected range: -0.2331 -0.2156
METOP-B IASI RADIANCES CHANNEL 1639 : out of range
15 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1229, expected range: -0.1017 -0.0940
METOP-B IASI RADIANCES CHANNEL 314 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0090, expected range: 0.0659 0.1198
METOP-B IASI RADIANCES CHANNEL 369 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1291, expected range: -0.0758 -0.0327
METOP-C IASI RADIANCES CHANNEL 5379 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2680, expected range: -0.2212 -0.1648
METOP-C IASI RADIANCES CHANNEL 5399 : out of range
13 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0705, expected range: 0.0942 0.1209
METOP-C IASI RADIANCES CHANNEL 258 : out of range
7 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1316, expected range: -0.1571 -0.1457
METOP-C IASI RADIANCES CHANNEL 260 : out of range
8 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0884, expected range: -0.1114 -0.0988
METOP-C IASI RADIANCES CHANNEL 273 : out of range
10 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1758, expected range: -0.1991 -0.1936
METOP-C IASI RADIANCES CHANNEL 1658 : out of range
14 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0311, expected range: 0.0399 0.0458
METOP-C IASI RADIANCES CHANNEL 314 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0420, expected range: 0.0193 0.0911
METOP-C IASI RADIANCES CHANNEL 369 : out of range
16 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1475, expected range: -0.0946 -0.0495
cris
All NPP CRIS ALL CHANNELS Global : all data missing
Severely_persistent: obs_number=0, expected range: 6077.71 9047.56
NOAA20 CRIS RADIANCES CHANNEL 949 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2112, expected range: -0.1890 -0.1721
NOAA20 CRIS RADIANCES CHANNEL 963 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0819, expected range: -0.0651 -0.0550
NOAA20 CRIS RADIANCES CHANNEL 965 : out of range
37 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2819, expected range: -0.2549 -0.2408
NOAA20 CRIS RADIANCES CHANNEL 989 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0288, expected range: 0.0564 0.0641
NOAA20 CRIS RADIANCES CHANNEL 62 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1967, expected range: 0.2233 0.2285
NOAA20 CRIS RADIANCES CHANNEL 65 : out of range
27 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.1954, expected range: 0.2159 0.2308
NOAA20 CRIS RADIANCES CHANNEL 108 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0324, expected range: 0.0238 0.0734
NOAA20 CRIS RADIANCES CHANNEL 118 : out of range
39 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.2677, expected range: -0.1545 -0.1261
NOAA20 CRIS RADIANCES CHANNEL 140 : out of range
33 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.3360, expected range: -0.2885 -0.2498
airs
AQUA AIRS RADIANCES CHANNEL 672 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=0.0535, expected range: 0.0605 0.0657
AQUA AIRS RADIANCES CHANNEL 218 : out of range
17 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0805, expected range: -0.0968 -0.0879
AQUA AIRS RADIANCES CHANNEL 201 : out of range
18 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.1500, expected range: -0.1800 -0.1670
AQUA AIRS RADIANCES CHANNEL 207 : out of range
19 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-0.0508, expected range: -0.0819 -0.0734
gpsro
COSMIC2-E5 GPSRO SETTING (23 impact heights affected) : out of range
Slight: obs_number=394.0000, expected range: 740.3727 1468.4508
Atmospheric Motion Vector
All NPP VIIRS AMV IR ALL LAYERS Global : all data missing
Severely_persistent: obs_number=0, expected range: 655.60 1565.40
resat
AURA OMI OZONE, TOP PRESSURE LAYER 12-13 (HPA) : out of range
41 times in the last 10 days for at least one item
Severely_persistent: avg_biascorr=-3.2193, expected range: -1.9682 -0.9765
Severely_persistent: avg_biascorr=-5.0428, expected range: -3.9705 -3.9122
NOAA-19 SBUV OZONE, TOP (21 pressure layers affected) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: obs_number=34.0000, expected range: 50.8555 58.8673
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 1010-1011 (HPA) : out of range
38 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=2.6011, expected range: 1.6344 1.9796
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 40-41 (HPA) : out of range
44 times in the last 10 days for at least one item
Severely_persistent: stdev_fgdepar=0.0663, expected range: 0.0208 0.0450
NOAA-19 SBUV OZONE, TOP PRESSURE LAYER 250-251 (HPA) : out of range
24 times in the last 10 days for at least one item
Severely_persistent: avg_fgdepar=0.3214, expected range: 0.0264 0.1883